Consultancy for Structural Design and Drgs

Amount

Consultancy for structural design of stay Anchor points for mooring of helicopter upto a depth of 4.5m below GL using RCC concrete or equivalent system to withstand an uplift force of 65 Ton. The Anchor system should be designed for four Anchor points (set of two each @ 2m C/C) to withstand 65 Ton dynamic loads under failure conditions and 25 ton for fatigue & operational conditions. Design creteria for Anchor points shall be as under:- (a) The helicopter should be moored when it is be tested with the engines running in all conditions and also when it is subject to ground testing. In mooring the nose landing gear and main landing gears upper assemblies should be secured to all mooring ground in all four directions/three directions. (b) The angle of 50 Degree is to be provided by means of a cord stretched from anchor points upto a height of 2500mm from the ground level. The anchoring cord/cable is to be provided by PMG/ user 3 BRD through GE. The angle of 50 or as per design is to be followed in consultation with GE. (c) The 3 BRD dispersal is fairly large and free of obstruction so as to permit complete ground running of the helicopters which involves full throttle operations’ on single engine/simultaneous engine operations including ‘Track check’ procedure/ 3 MR trimmer checks. The operations in dispersal are to be strictly limited to aircraft operations to maximum use of collective upto 3 and aircraft not leaving the ground onto hover.

(d) The top of Anchor Block should flush with existing PQC level in form of saucer opening or as per designer in consultation with GE. The anchor block post should have adequate friction strength to cater the need of operation/fatigue forces. During the construction codal provision of max temperature of 70 Degree Celcius and temperature granted of 20 C to be fulfilled as per 1S16700 HYSD BARP/CRS steel/EN32 steel or any other equivalent material to be used. Casting should be done in a manner that shrinkage cracks should not appear at the surface. The concrete cover to be provided as 75mm or as per latest IS code provisions. (e) Recommendation of testing procedure/modalities for post completion test to establish the compliance of design criteria. (f) The complete design folder should be vetted by IIT with stability certificate. The cost of which to be deemed included in quoted rate. (g) Supervising the execution of work during execution and to ensure compliance of Structural design recommendation for material and workmanship. (h) Supervising the testing of each Anchor Block for uplift pressure of 25 Ton to be checked after completion of work to certify meeting the design criteria. (All arrangement for testing and cost thereof shall be borne and provided by the bldg. contractor).

Interstellar Testing Centre Private Limited

Geoscience Engineering Services

SUBHASH ANITA AND ASSOCIATES